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    <title>left</title>
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<ul>
	<li><a target = "xin" href = "zuo1.html">作业一</a></li>
	<li><a target = "xin" href = "zuo2.html">作业二</a></li>
	<li><a target = "xin" href = "zuo3.html">作业三</a></li>
   	<li><a target = "xin" href = "zuox.html">作业四</a></li>
	<li><a target = "xin" href = "zuo5.html">作业五</a></li>
	<li><a target = "xin" href = "zuo6.html">作业六</a></li>
</ul>
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